Effect of speed change on engagement position of fixed-shaft gear drive
It is assumed that the centre of both gears is rigidly supported.In the meshing state of tooth surface, the relationship […]
Scientific
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Profile modification of involute spur gear drive system
Gear modification is a key technology to reduce vibration, noise and improve reliability of gear transmission system.Since the tooth profile […]
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Fan gear box lubrication
Lubrication of gear box is very important to the operation of gear box, especially the position of bearings, gear meshing […]
Scientific
Nonlinear time-varying model of gear transmission system
The nonlinear time-varying model contains many nonlinear factors such as time-varying stiffness and clearance. Recently, with the development of nonlinear […]
Scientific
The influence of meshing state change of tooth surface and back of involute spur gear on meshing position
The engagement state of the tooth surface can be determined by the formula at any time during the transmission process.From […]
Scientific
Dynamic meshing stiffness of involute spur gear transmission system
It can be seen from the analysis that the dynamic boundary conditions α B (T) and the dynamic boundary conditions […]
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Processing of double gear pair large gear
(1) Big gears need to be pre-grinded after carburizing treatment, in order to eliminate heat treatment deformation before machining locating […]
Scientific
Mechanism analysis and improvement of gear surface corrugation order noise
1. Gear corrugation order noise and analysis A bewildering “ghost-step” noise occurs in the pre-production stage of a vehicle reducer […]
Scientific
Nonlinear dynamic model of lateral-torsional-pendulum coupling for involute spur gear drive
The three-dimensional solid model of involute spur gear drive is shown in the figure, and the following assumptions are used […]
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Development status of fan gearbox
Wind power gearbox is the key part of wind power generator. With the development of wind power, wind power gearbox […]
Scientific
Nonlinear time-invariant model of gear drive system
In the process of gear transmission, in order to avoid jamming, clearance must be left between the sides of the […]
Scientific
Effect of Center Distance Change of Involute Spur Gear on Meshing Position
During gear transmission, changes in center distance cause changes in the direction of the engagement line, resulting in the actual […]
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Angular positioning groove machining of double gear shaft
(1) After grinding the teeth of the gear shaft, the locating groove is machined as shown in the figure. (2) […]
Scientific
Mechanism of gear surface corrugation order noise
In the gear vibration and noise phenomena of the automobile industry, gear screeching and knocking are usually the most common […]
Scientific
Nonlinear dynamic model of coupling of involute spur gear drive
According to the method used in establishing dynamic model, the dynamic model of gear transmission system can be divided into […]
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Nonlinear dynamic meshing stiffness of fixed-shaft gear drive
When calculating meshing stiffness by quasi-static method, fixed constraints are generally imposed on the center position of each gear and […]
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Vibration characteristics test of spur gear drive system
The experimental study on gear transmission system can repeat the same test condition several times, thus helping researchers to find […]
Scientific
Non-linear dynamic tooth side clearance of fixed-shaft gear drive
In calculating the dynamic meshing force of the gear, the influence of the degree of freedom of swing is neglected, […]
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Nonlinear dynamic meshing model of involute spur gear drive
For involute spur fixed-shaft gear drive and planetary gear drive respectively, a nonlinear dynamic model of yaw-torsion coupling was established […]
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Technical improvement of large-size and high-precision spiral bevel gears
The design of side gears and hypoid gears is the same as that of arc gears and hypoid gears. The […]
Scientific
Linear time-varying model of gear transmission system
In order to ensure the continuity of gear drive, the overlap degree of gears is generally greater than 1, which […]
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Non-linear time-varying model of spur gear
In fact, the engagement parameters such as engagement angle, clearance and time-varying rigidity of gears are affected to some extent […]
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Dynamic Models of Spur and Planetary Gear Drives
For involute spur gear drive and planetary gear drive, the yaw-torsion coupling non-linear dynamic model including the dynamic changes of […]
Scientific
Centroid Position Vector of Sun Gear Planetary Wheel and Action Direction of Engaging Force
The main difference between the three-dimensional dynamic model of the sun-planetary gear and that of the fixed-shaft gear drive is […]
Scientific
Nonlinear dynamic model of lateral-torsional-pendulum coupling for planetary gear drive
The three-dimensional solid model of the Involute Spur Planetary gear drive is shown in the figure, and the assumptions used […]
Scientific
Nonlinear Dynamic Model of Lateral-Torsion-Swing Coupling for Fixed-Shaft Gear Drive
Lagrange method is used to establish the yaw-torsion coupling nonlinear dynamic model of fixed-axle gear drive. The Lagrange equation is: […]
Scientific
Gear measurement and fault diagnosis
The manufacturing error of gear not only affects the stability of power transmission, resulting in vibration noise and dynamic load […]
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Process analysis of double gear pairing
(1) To meet the high requirement of gear accuracy, foreign high-precision gear grinder is used for gear grinding. Specifically, German […]
Scientific
Nonlinear dynamics of involute spur gear drive system
(1) Nonlinear dynamic model of yaw-torsion coupling of involute spur gear drive For involute spur fixed-shaft gear drive and planetary […]
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Nonlinear vibration characteristics of spur gear drive system
Nonlinear factors such as backlash and time-varying meshing stiffness inevitably exist in gear meshing process, which belongs to the research […]
Scientific
Linear time-invariant model of gear transmission system
In the linear time-invariant model of gear transmission system, all non-linear factors are neglected and the time-varying meshing stiffness is […]
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Non-linear time-varying model of spur gear drive system
Before 1950s, gear dynamics was based on impact theory, and meshing impact was used as the basis to describe and […]
Scientific
Application of gear material
With the global shortage of resources and the aggravation of environmental pollution, people pay more and more attention to the […]
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Processing technology of double gear pairing
Double gear is widely used in gear boxes. In general transmission, it is not required to align the teeth.However, this […]
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High-precision spiral bevel gear machining technology
Gears as high as arc wheels are also called arc wheels. From the side, they show a flat gear shape. […]
Scientific
Typical gear processing and precision forging of gears
Performance Analysis of Gears Produced by Two Processes The gear produced by a typical gear machining process is shown in […]
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Technological innovation of cylindrical gear machining
In modern machinery, gear transmission is the most widely used mechanical transmission mode. Its function is to transmit the motion […]
Scientific
Effect of Coupling between Tooth Side Clearance and Lubricant Viscosity of Spur Gear
The figure shows the distribution cloud of the tooth surface contact temperature on the lubricant viscosity and the tooth side […]
Scientific
Vibration and noise control of gear drive
The purpose of vibration and noise control of gear transmission is mainly to improve the dynamic performance of the transmission […]
Scientific
Correction measures and experimental verification of staggered helical gears
Corrective measures According to heat treatment process inspection and finite element calculation results, the transmission staggered helical gear is quenched […]
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Machining Technology of Large Size and High Precision Spiral Bevel Gear
Processing principle of spiral bevel gear: the analog wheel is the processed gear, the uniform chuck is the teeth of […]
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Principle Analysis of Contact Zone Correction of Klingenberg Helical Gear
Correction in the contact area of the Klingenberg helical gear teeth can be achieved by changing the following parameters: (1) […]
Scientific
Effect of Coupling Torque and Backlash of Spur Gear
The figure shows the distribution cloud of the tooth contact temperature in the clearance plane between the torque and the […]
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Principle of internal and external gear synchronous multi motor
According to the principle of internal and external gear synchronous multi motor, an external involute gear is set in a […]
Scientific
Efficient transmission of gear drive and energy saving
Efficiency is a very important performance index for the transmission of power. Low transmission efficiency will not only result in […]
Scientific
Finite element calculation of staggered helical gear
1. Calculation Model In order to investigate the contact stress on the tooth surface of this transmission staggered helical gear, […]
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Machining large-size and high-precision spiral bevel gears
Large diameter spiral bevel gears are mainly used for large reducers in mineral, metallurgical, petroleum and other industries. With the […]
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Testing of other components of main helical gear
Differential housing inspection (1) Hardness: 207HB. Metallographic structure is pearlite + reticulate ferrite. Grain size is more uniform. A few […]
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Correction Principle and Points for Attention of Contact Zone of Klingenberg Helical Gear
In order to correct the contact area of Klingenberg helical gears during machining, a double-layer cutter head is required. The […]
Scientific
Effect of Coupling between Speed and Side Clearance of Spur Gear
The figure shows torque T=10 N_m for four different lubrication states and oil viscosity 0=0.033At Pa_s, the distribution cloud of […]
Scientific
Effect of Coupling Torque and Viscosity of Lubricating Oil on Spur Gear
The figure shows a cloud diagram of the temperature change of the tooth contact in the plane of the rotational […]
Scientific
Calculation of axial pitch of six-circle arc helical gear
The working tooth profile of the hexagon-arc helical gear is composed of six segments of circular arcs. It adopts the […]
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Double internal and external mesh gear multi motor
With the development of society, mechanization is becoming more and more popular, and the level of automation is increasing. Because […]
Scientific
Improve the bearing capacity of gear transmission
According to its main functions, gear transmission can be divided into motion transmission, power transmission, or both. The main function […]
Scientific
Heat Treatment Process Check for Staggered Helical Gear Fault
The driving wheel of the staggered helical gear is made of 42Cr Mo, conditioned and tempered, while the driven wheel […]
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Gear manufacturing level and gear box optimization design
The performance and stability of gearbox come from the level of design and manufacture of gears. For the manufacture of […]
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Machining Technology of Large Size and High Precision Spiral Bevel Gear
Spiral bevel gears are key parts in mechanical transmission field that transmit motion or power between intersecting or staggered shafts. […]
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Detection of secondary helical gear teeth
Analysis: (1) The hardened layer of tooth surface has fine martensite structure of grade 2 and non-martensite structure of 0.02mm, […]
Scientific
Failure Analysis of Right Traction Gear of Electric Traction Shearer
Samples are taken from the invalid gears, after grinding and polishing, the metallographic structure is observed by Olympus microscope, and […]
Scientific
Characteristics and machining requirements of contact area of Klingenberg spiral bevel gear
The contact area mainly refers to the actual contact between the two bevel gears during meshing.The requirements for contact area […]